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LEASES - Schedule of Future Payments for Finance Leases (Details) $ in Millions	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
2024	$ 9.3
2025	8.1
2026	7.8
2027	7.3
2028	6.7
After 2028	35.5
Total finance lease payments	74.7
Amounts representing imputed interest	(20.0)
Present value of lease payments	$ 54.7
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other
Less: current portion	$ (7.2)
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other
Total long-term obligations under finance leases	$ 47.5
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	PROPERTY, PLANT AND EQUIPMENT, NET
Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets	$ 323.7
Weighted-average remaining lease term (years)	11 years
Weighted-average discount rate	5.50%
Evergy Kansas Central
Lessee, Lease, Description [Line Items]
2024	$ 8.3
2025	7.4
2026	7.0
2027	6.5
2028	6.1
After 2028	34.8
Total finance lease payments	70.1
Amounts representing imputed interest	(19.2)
Present value of lease payments	50.9
Less: current portion	(6.3)
Total long-term obligations under finance leases	44.6
Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets	$ 63.5
Weighted-average remaining lease term (years)	11 years 4 months 24 days
Weighted-average discount rate	5.60%
Evergy Metro
Lessee, Lease, Description [Line Items]
2024	$ 0.8
2025	0.6
2026	0.5
2027	0.5
2028	0.4
After 2028	0.7
Total finance lease payments	3.5
Amounts representing imputed interest	(0.6)
Present value of lease payments	2.9
Less: current portion	(0.7)
Total long-term obligations under finance leases	2.2
Right-of-use assets under finance leases included in property, plant and equipment, net on the consolidated balance sheets	$ 2.9
Weighted-average remaining lease term (years)	6 years
Weighted-average discount rate	5.80%

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease.

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Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.

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Amount of lessee's undiscounted obligation for lease payments for finance lease.

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.

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Amount, after accumulated amortization, of right-of-use asset from finance lease.

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Weighted average discount rate for finance lease calculated at point in time.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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